49ers Kaepernick wins battle of back-up QBs

(Reuters) - San Francisco's Colin Kaepernick tamed the fierce Chicago defense and dominated the battle of back-up quarterbacks as the 49ers scored a commanding 32-7 win over the Bears on Monday.

With both Alex Smith (49ers) and Jay Cutler (Bears) sitting out due to concussions, the second-year Kaepernick rose to the occasion in his first NFL start by tossing two touchdown passes.

The young quarterback led the 49ers to a 20-0 lead at half-time and never took his foot off the gas.

"We didn't know if it was going to be (Smith) or me (starting), it's just great to be on the field," Kaepernick told reporters. The decision on who was starting was not officially announced until early on Monday.

"I wasn't really nervous, I've had a lot of time in this offense. It's everything I could've wished for."

Things did not go smoothly for Bears' back-up Jason Campbell, who was sacked six times and intercepted twice in the game at San Francisco's Candlestick Park.

The Bears trailed 27-0 before Brandon Marshall caught a 13-yard touchdown pass in the third quarter for the team's only score. Chicago's (7-3) second straight loss dropped them into a tie with Green Bay for first in the NFC North.

Kaepernick finished with 243 yards passing and no turnovers and San Francisco (7-2-1) added 123 yards on the ground to extend their lead in the NFC West.

49ers tight end Vernon Davis caught a touchdown pass in the first half while Kendall Hunter ran in a 14-yard score.
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